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U-1250 - Rocket Engine - Russia - U-2000 - Rocket Engine - Russia - U-400-10 - Rocket Engine - Russia - U-400-2 - Rocket Engine - Russia - Nitric acid/Amine propellant U102-000 - Rocket Engine - Russia - Nitric acid/UDMH propellant U400-10 - Spacecraft - Manned - Rocketplane - Russia UA-156 - Rocket Engine - USA - Solid propellant UA1200 - Rocket Engine - USA - Solid propellant UA1205 - Rocket Engine - USA - Solid propellant - See UA1200 UA1206 - Rocket Engine - USA - Solid propellant - See UA1200 UA1207 - Rocket Engine - USA - Solid propellant - See UA1200 UAE - Emiratan space history UARS - Spacecraft - Earth - Ionosphere - USA Uchinoura - Orbital Launch Site in Japan. - See Kagoshima Udarov - Grigori Rafailovich Udarov - Russian Government Official - UGM-133A - Intercontinental ballistic missile - (US Department of Defence Designation) - See Trident UGM-27A - Missile - (US Department of Defence Designation) - See Polaris UGM-27B - Missile - (US Department of Defence Designation) - See Polaris UGM-27C - Missile - (US Department of Defence Designation) - See Polaris UGM-73A - Submarine-launched ballistic missile - USA (US Department of Defence Designation) - See Poseidon UGM-96A - Intercontinental ballistic missile - (US Department of Defence Designation) - See Trident UGM-96B - Intercontinental ballistic missile - - See Trident UHF - Space Project - Communications - UK - British space history UK - Spacecraft - - - Ukmerge - IRBM Base in Lithuania operated by Russia. Ukraine - Ukrainian space history Ukraine Group - 1996 - Cosmonaut training group Ukrainian space history - - See Ukraine Ulmer - Ralph E Ulmer - American Manager - Ulysses - Spacecraft - Solar - - Europe UM-129A - Rocket Engine - Japan - Solid propellant Umanskiy Space Capsule - Spacecraft - Manned - Spacecraft - USSR Umpfenbach Joachim - Joachim Umpfenbach - German Propulsion expert - UMPIRE Convair - Spacecraft - Manned - Mars Expedition - USA UMPIRE Douglas - Spacecraft - Manned - Mars Expedition - USA UniSat - Spacecraft - Technology - - Italy Universal - Intercontinental ballistic missile - Ukraine Unmanned Logistic System - Spacecraft - Manned - Lunar Logistics - USA - See Apollo ULS UoSAT - Spacecraft - Communications - Amateur Radio - UK Upham - Suborbital Launch Site in USA operated by . - See Spaceport America Upper Atmosphere Research Satellite - Spacecraft - Earth - Ionosphere - USA - See UARS Upstage - Rocket Engine - USA - Solid propellant Upstage - Sounding rocket - USA UR-100 - Anti-ballistic missile - Russia - See Taran UR-100 - Intercontinental ballistic missile - Russia UR-100K - - - See UR-100 UR-100M - - - See UR-100 UR-100N - - UR-100N - All-solid orbital launch vehicle - UR-100N - Intercontinental ballistic missile - Russia UR-100NU - - - See UR-100N UR-100NU 15A35 - - - See UR-100N UR-100NUTTKh - - - See UR-100N UR-100U - - - See UR-100 UR-200 - Intercontinental ballistic missile - Russia UR-200A - Intercontinental boost-glide missile - - See UR-200 UR-200B - Orbital missile - - See UR-200 UR-500 - - - See Proton UR-500 - rocket - See Proton UR-500K - - - See Proton UR-500KM - - - See Proton UR-500MK - rocket - See Proton UR-530 - rocket - See Proton UR-700 - Heavy-lift orbital launch vehicle - Russia UR-700M - Heavy-lift orbital launch vehicle - Russia UR-900 - Heavy-lift orbital launch vehicle - Russia Uragan - Spacecraft - Navigation - - Russia - See Glonass Uragan Space Interceptor - Spacecraft - Manned - Combat - Russia Ural - - - See Proton Uran - Spacecraft - Military - ASAT Target - Russia - See IS-P Urbani - Luca Urbani - Italian Payload Specialist Astronaut - Urbanski - Arthur P Urbanski - German Engineer - US - Spacecraft family US Cruise Missiles - Launch Vehicle Family US Rocketplanes - Spacecraft family US Space Stations - Spacecraft family US-A - Spacecraft - Surveillance - Naval Radarsat - Russia US-AM - Spacecraft - Surveillance - Naval Radarsat - Russia - See US-A US-KMO - Spacecraft - Early Warning - - Russia - See Prognoz SPRN US-KS - Spacecraft - Early Warning - - Russia - See Oko US-P - Spacecraft - SIGINT - Naval reconnaisance - Russia US-PM - Spacecraft - SIGINT - Naval reconnaisance - Russia - See US-P US-PU - Spacecraft - SIGINT - Naval reconnaisance - Russia - See Pirs-2 US-PU - Spacecraft - SIGINT - Naval reconnaisance - Ukraine USA - American space history USA - article - Apollo Spacecraft Systems Development Diaries USA - article - Believing in 'Buck Rogers' USA - article - Beyond the Vapor Trails USA - article - By Gemini to the Moon! USA - article - Lunex USA - article - Max Faget: Master Builder USA - article - Mercury & Gemini Spacecraft Systems Development Diaries USA - article - Project Horizon USA - article - Skylab's Untimely Fate USA - article - Space Cadet Usachyov - Yuri Vladimirovich Usachyov - Russian Engineer Cosmonaut - Energia Engineer Group 10 - 1989 USAF Dynasoar Group - 1960 - Astronaut training group USAF Dynasoar Group - 1962 - Astronaut training group USAF MOL Group 1 - 1965 - Astronaut training group USAF MOL Group 2 - 1966 - Astronaut training group USAF MOL Group 3 - 1967 - Astronaut training group USAF Recommended Station - Spacecraft - Manned - Space Station - USA USB - Spacecraft - Military - ASAT - Russia USERS - Spacecraft - Materials - - Japan USM No. 176-01 - Spacecraft - Manned - Space Station - Russia - See ISS Zvezda USRM - Rocket Engine - USA - Solid propellant USSR - Soviet space history Ustinov - Dmitri Fedorovich Ustinov - Russian Government Official - Ustinov N G - Nikolai Grigoyevich Ustinov - Russian Military Officer - Ute - Sounding rocket - USA Ute Tomahawk - rocket - See Tomahawk Sandia Utility - article - Chronology Index Utkin - Vladimir Fedorovich Utkin - Russian Chief Designer - Utkin Ivan - Ivan Ivanovich Utkin - Russian Engineer - Utsch - Albert Utsch - American Engineer - Uzbek space history - - See Uzbekistan Uzbekistan - Uzbek space history Uzhur - ICBM Base in Russia. 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